Pneumatic tire.



No. 878,075. PATENTBD FEB. 4, 1908.

H. D, B. LEFFERTS & E. DE CAMP.

PNEUMATIC TIRE. APPLICATION FILED JAN.15, 1907.

iti

titirr'fmr @mirri-ei :with Je 'sin fil HENRY l). B. LEFFERTS AND ELPHALET DE CAM?, OF ORANGE, NELi-V JERSEY.

EPNEUIMATIC TRE.

To ri/ ello/n it 'nui/1,1 concer/1:

Be ii known that we, lliixnv l). tl ,bnriizu'is and lirirnari-rr Di: (Emir, citizens ot the linited States, residing at Orange, in the i,

Specification of Letters Fatemi.

Fatentect Feb. el., ESSE.

:zitioiitiled January 15, 1907l Serial NO SWF/MO.

serve tube. Fig. (i is an enlarged sectional elevation of the extensible and eontractiblo valve stein tor the reserve tube.

As in my toriner patent aforesaid, the )resent invention requires no material change in the usualconstruction oi an inner tube pneumatic tire7 and a tire iitted up to mak To this end the invention has in view an t improvement in,the structural formation o't the supplemental reservo tube utilized in the t type ot' tire shown in said l'ornier patent, and

also in the. valve stein 'titting therefor, Whereby the positioning ol' the. reserve tube on the wheel riin is greatly facilitated.

rllie special obieet ot the invention is to provide a normal detlatetl reserve tube with a valve stein tittnnr ol' variable. length that D d. l

is, so constructed as to be capable of being lengthened and shortened as the diameter of' theftire. may require.

with these and other objects in viewl which will be readily apparent to tire manuthe wheel rii'n.

tactiners and iitters, the. invention consists in the. novel construction, combination and arrangement. ot parts hereinafter more fully described,v illustrated and claimed.

The essential features ot the invention, in-

voli'ed in the new 'features ot the reserve i tube, including the extensible and contractible valve stein, are susceptible to modification without departing from the scope. of the invention, but a preferred embodiment ot vthe invention shown in the accompanying drawings, in which Figure l is a circumferential or longitudinal seetional View o'l a pneumatic tire einbodying the improvements contemplated by the present invention. Fig. 2 is a cross sectional view on the line 2-`2, ot itig. 1, but showingl the. main inner tubedellated and the supplemental reservo tubel inllated. vFig. is :i detail sectional view on the line 3-23 ol` ltig. l, showing in plan the end portions ot the supplemental tube and the holding means theiel'or. Fig. 3. showing the'interlocking action lsupplemental tube when the saineis inflated. Fig. 5 is an enlarged detailed sectional view tirely around the saine.

. .usual manner.

a self-repairing tire in accordance with the present invention embodies in its general construrtion the inain outer easing i, an in tlatable inain inner tube 2, an inllatable snp pleinental reserve tube 3, which. parts are assembled in operative. relation and plaeed upon the. wheel rim 4.

'ihe inain inner tube is usually et the common continuous type arranged whollyY within the outer asing and extending enttt a convenient, point, the tube 2 is titted with. Athe usual intlating valve stein 3, in communication with the interior of the tube and operating in the YThe supplemental inner tube 33, lies wholly without the inain `iiinei' tnbe and is interposed. between the inner side ot the latte and Also, the said reservo tube 3 is ot a dividedeonstruction and arranged with its separate end portions t3, disposed upon opposite sides ot the valve stem tor the niainiinner tube. and held in close abutting relation to said stein through the inew dinin of' holding tabs 7. These holding tabs 7 preferably consist ot strips ot efinvas or oanvas and rubber vulcanized, or otherwise suital'itvv secured permanenti)v to the end portions of the tube 3, and projected befvond said end port-ions. The said holding tabs are also provided with valve openings S, reeeivinb' therein the valve stein 5,. therebiprovi( ing means tor holding the end por 'tionsot the divided end' tube. up to ainL and thereby` properlv interloelted relation, and to liti 'up Fie` 4 is a view similar to i ot tlio the entire interior intlatable space ot theI Aouter easing, the inner reserve tube 3 is oon- (i fr Cri sti-noted ot a greater intlatable diameter than v the inain inner tube 2, so that when the latter deilated and the supplemental "tube, intla-ted. therehv eausing'the valve stein .5 to be' drawn further into the easing, theend portions oi' the latter will be distended. bv ot one end portion ot' the. supplemental rel intuition, about the said valve stern 5, there- @7eme site relation. to the Valve stern, said s oft oep portions being adapted to be iniated about said Valve stem for the main limer tube.

2. In e tire of the class described, the oombinsttion with the outer casing and the mainV inner tube, of a normally` deiateqd supplemental reserve tube having en extensible and contractible valve stem. A

3. ln a tire of the Class described, the Combination with the outer Casing and the main inner tube, of the normally deflated supplemental reserve tube tensiole and contractlble valve stein, seid Valve stein consistingvof ay series of detach:

'ably Connected valve stem sections having inner and outer Washer joints.

4. In a tire of the class described, the conn bxnation with the outer caslng and the mam inner tube, of the normally deflated supple,-

mental reserve tube provided with, en extensible and oontractible valve stem, 'said valve stem consisting of three or more dete'ohably connected sections, the outermost valve carrying section being interchangeable with the intermediate section or sections, and. the oint connection between each two seotions consisting of a threaded Socket and inu terior washer seat provided in and onone of tne vsections and. en exteriorly threaded connecting pin end inside washer oarried on the other of seid sections.

In testimony whereof we hereunto affix our signatures in the presence of two Witnesses.`

HENRY D. B.' LEFFERTS. ELIPHALET DE CAM?.

itnesses I ARTHUR J. MoDEif'rr'r, THOMAS MCDEWTT. 

